It is seen from Lemma REF  that \(c_*(A)\)  would be the same if the admissible measures in (REF )
were required to be of compact support. This in turn implies thatWe write \(c(A)\)  in place of \(c_*(A)\)  if \(A\)  is capacitable, that is, if \(c_*(A)=c^*(A)\) , where \(c^*(A)\)  is the outer capacity of \(A\) , defined as \(\inf \,c_*(D)\) , \(D\)  ranging over all open sets containing \(A\) . This occurs, for instance, if \(A\)  is compact [1]} or open.
\(c_*(A)=\lim _{K\uparrow A}\,c(K).\) 
